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[Fizinfo] BME Elm. Fiz. Szeminárium, nov. 21. Pozsgay Balázs

From: Janos Asboth <asboth.janos AT ttk.bme.hu>
To: fizinfo AT lists.kfki.hu, "elmfiz.oktatok-kutatok" <elmfiz.oktatok-kutatok AT lists.bme.hu>, elmfiz.hallgatok AT lists.bme.hu
Subject: [Fizinfo] BME Elm. Fiz. Szeminárium, nov. 21. Pozsgay Balázs
Date: Wed, 19 Nov 2025 11:41:54 +0100
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Meghívó

BME Elméleti Fizika Szeminárium,

nov. 21. péntek 10h15,

1111 Budapest, Budafoki út 8., BME F III. magasföldszint 01.,
Elméleti Fizika Tanszék szemináriumi szoba

Pozsgay Balázs (ELTE TTK Elméleti Fizika Tanszék):
Eigenstate preparation in integrable spin chains: A review

Recently there has been considerable interest in the topic of eigenstate
preparation. The question is whether selected eigenstates (or perhaps all
eigenstates) of certain models can be prepared efficiently on a quantum
computer. Efficient means that the number of gates needed (and possibly the
number of auxiliary qubits needed) scales only polynomially with the number
of particles and the length of the spin chain. Integrable models have
relatively “simple” eigenstates, as compared to those of chaotic models.
This motivated the idea/conjecture that eigenstates of integrable models
should not be complex from the quantumcomputation point of view. However,
the question is very far from obvious. In this talk we review recent
attempts and contributions, including work of the speaker[1, 2]. We will
explain that the question of eigenstate preparation and quantum
computational complexity in integrable models is not yet settled, and it is
an active area of research today.

[1]: PRX Quantum 6, 030316 (2025)
[2]: SciPost Phys. 18, 187 (2025)

Minden érdeklődőt szeretettel várunk.
Asbóth János,
szemináriumi koordinátor

[Fizinfo] BME Elm. Fiz. Szeminárium, nov. 21. Pozsgay Balázs, Janos Asboth, 11/19/2025